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Proceedings Paper

Development of a packaged optical phase-locked loop for use as a signal source in phased-array communications antennas
Author(s): Lloyd N. Langley; Colin Edge; Michael J. Wale; Ulrik B. Gliese; Alwyn J. Seeds; Xuan Huang; James G. Wright; Louis A. Coryell
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Paper Abstract

A packaged diode-laser OPLL sub-system has been constructed for evaluation in a proof-of-concept coherent optical beamforming system. The loop has been implemented with narrow linewidth laser diodes, micro-optics and wide bandwidth electronics to give optimum phase noise performance. The laser diodes are designed for wide bandwidth and high FM-efficiency, while the main challenge in the construction of the packaged OPLL is the realization of a high gain loop, with a small propagation delay. A total phase variance of 0.05 rad2 has been achieved, and that within the 15 MHz system bandwidth is 0.0007 rad2. The OPLL can operate with LO frequencies from 7-15 GHz. This paper details the performance of the completed OPLL module together with key results for the custom FM lasers designed and fabricated for use within it.

Paper Details

Date Published: 3 November 1998
PDF: 7 pages
Proc. SPIE 3463, Photonics and Radio Frequency II, (3 November 1998); doi: 10.1117/12.330389
Show Author Affiliations
Lloyd N. Langley, GEC-Marconi Materials Technology, Ltd. (United Kingdom)
Colin Edge, GEC-Marconi Materials Technology, Ltd. (United Kingdom)
Michael J. Wale, GEC-Marconi Materials Technology, Ltd. (United Kingdom)
Ulrik B. Gliese, Technical Univ. of Denmark (United States)
Alwyn J. Seeds, Univ. College London (United Kingdom)
Xuan Huang, Univ. College London (United Kingdom)
James G. Wright, U.S. Army Communications and Electronics Command (United States)
Louis A. Coryell, U.S. Army Communications and Electronics Command (United States)

Published in SPIE Proceedings Vol. 3463:
Photonics and Radio Frequency II
Gregory J. Zagar; Anastasios P. Goutzoulis; Andrew R. Pirich, Editor(s)

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